Struct Exact 

pub struct Exact<const VALUE: c_int>(/* private fields */);

One native return whose producer reports exactly -1 or its one success value, so the ABI’s exactness proof is discharged once at admission and the decoder below is total without a second range check.

Implementations

impl<const VALUE: c_int> Exact<VALUE>

pub unsafe fn try_admit<E: From<Errno>>( self, errno: impl FnOnce() -> Errno, ) -> Result<(), E>

Decodes the admitted success value without re-deriving its domain.

Safety

errno reads that thread’s slot before another syscall.

Trait Implementations

impl<const VALUE: c_int> Clone for Exact<VALUE>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<const VALUE: c_int> Copy for Exact<VALUE>

impl<const VALUE: c_int> Debug for Exact<VALUE>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.